Guides
Plain-English explainers for the recovery-gear specs that matter and the marketing tricks that do not.
- Red light irradiance explained: why distance is the whole game
Why a mW/cm² number is meaningless without a stated distance, the surface-reading trick, and what to look for instead.
- FDA cleared vs FDA registered: almost no red light panel is cleared
What 'registered', 'listed', and '510(k) cleared' mean, and why nearly every consumer panel - including Joovv and Kineon - is not actually cleared.
- Cold plunge vs ice bath: what a built-in chiller actually buys you
The difference between a self-chilling plunge and a tub you fill with ice: temperature hold, ongoing cost, water care, and why the two are not the same product.
- Cold plunge running costs: the electricity bill brands leave off the box
Why the chiller's electricity is the cold-plunge cost almost no brand discloses, how insulation changes it, and the true cost of a self-chilling plunge vs an ice-only tub.
- Low-EMF infrared saunas: why the number means nothing without a position
Why a sauna's low-EMF claim is only usable as a milligauss figure measured at the seated body position, the at-the-heater trick, and what full spectrum should mean.
- Full spectrum vs far infrared: what 'full spectrum' should mean
Why full spectrum is the most stretched sauna claim, what near, mid, and far infrared are, and why the label is only honest with a separate near-infrared emitter.
- PEMF field claims explained: why 'up to X gauss' is not a spec
Why a PEMF field claim is only usable as a field strength in real units at a stated frequency, the peak-gauss and unit-less-level tricks, and why a real FDA 510(k) clearance is rare.
- FDA cleared vs FDA registered PEMF: why almost nothing is cleared
What 'FDA registered', 'listed', and '510(k) cleared' mean for a PEMF device, why a real clearance is rare in consumer PEMF, and how to read the marketing.
More guides (wavelengths, EMF and flicker, cold plunge water care, sauna) are on the way.